The principle used in a musket was just like the principle behind cannon which is why muskets were also called mini canons. As it was difficult for a soldier to measure the amount of powder to be poured down the barrel, it was supplied in a pre-measured pouch that had to be torn apart by the soldier before every shot.
The approx distance between Heathrow and Gatwick Airport in a straight line is 29 miles or 46.66 KMS See the maps and links below for additional information related to driving distances, fuel costs and estimated journey times for this trip from Heathrow to Gatwick Airport.Happy trails!!Advertisements:f you were travelling in a mid range car that averaged 40 MPG and were paying Â£6.36 per gallon (1.40 per litre) for your petrol then the cost for this trip based on an estimated driving distance of 35.38 miles (56.93 kms) , from Heathrow to Gatwick Airport for your fuel would be in the region of Â£5.63.
Gatwick Express trains depart every 15 minutes from South Terminal to London Victoria and take 30 minutes. The Heathrow Express non stop service to Heathrow Airport departs from Paddington every 15 minutes.